My Lowe's Playhouse/Chicken coop has room for about 5 chickens...So I bought 6 Barred Rock chicks - hoping to have at least 5 survive to adulthood. Anyway, we put in the run today and it allows for just 50 square feet of run space (at the cost of nearly $300!). How much room will my grown chickens realistically need?

anywhere from 6-10 sq feet should be fine, based on how large your chickens are. I have quite a few, and right now they each have about 7 sq ft and they're doing great! I wouldn't go under that number, though, cause then it starts getting really cramped. Good luck!